HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

What is the action of Na Metal on ammonia? 

What is the action of the following reagents on ammonia :
Sodium metal

What is the position of actinoids in periodic table ?

How is Methoxyethane prepared from : Diazomethane

How are the following compounds prepared?

Propan-1-ol from propanal

How is nitroethane converted into N-ethylhydroxylamine

How is nitroethane converted into acetic acid

How is carbolic acid prepared from the given compounds :

Chlorobenzene and steam at 698K?

What is the action of dioxygen on Iron

What is the action of dioxygen on Carbon disulfide

The process in which the value of ΔU = 0 is __

The half-life period of zero order reaction A → product is given by

(a) `([A]_0)/k`

(b) `0.693/k`

(c) `[A]_0/(2k)`

(d) `(2[A]_0)/k`

Write the chemical equations involved in van Arkel method for refining zirconium metal.

Propene on oxidation with diborane in presence of alkaline hydrogen peroxide gives

(a) propane-1- ol

(b) propane-2-ol

(c) allyl alcohol

(d) propane-1, 2-diol

Identify 'A' and 'B' in the following reaction and rewrite the complete reaction :

What is Nessler’s reagent?

Write chemical reaction to prepare the Dextron polymer:
Dextron

Distinguish between crystalline solids and amorsphous solids.

What is Grignard reagent?

The half life period of a first order reaction is 6. 0 h . Calculate the rate constant